Hello all, A vintage Hollis double chambered for the .577 2-3/4” shell recently appeared for sale on the web not to long ago. This rifle is regulated with the 750 grain bullet at 1800 fps. What’s your opinion on this caliber and bullet weight? Woodleigh lists a minimum impact velocity of 1800 fps for reliable expansion, so I’m having doubts about bullet availability if I can’t use the Woodleighs due to the velocity being too slow. The rifle I believe is offered at a decent price, and I would be interested in purchasing it this would be a useful caliber. Thanks!